Author Question: Compared with special relativity, general relativity is more concerned with A) acceleration. B) ... (Read 68 times)

Metfan725 · **on:** Jul 29, 2018

Compared with special relativity, general relativity is more concerned with

A) acceleration.
B) gravitation.
C) spacetime geometry.
D) all of the above
E) none of the above

Question 2

A steel bar with a cross-sectional area of 1.00 10-4 m2 is heated to 100C and then it is clamped at both ends with clamps that are 2.0 m apart.

When the bar cools to 20C what is the force exerted by the bar on the clamps? The coefficient of thermal expansion of steel is 12 10-6 K-1 and Young's modulus for steel is 20 1010 N/m2. A) 1.9 104 N
B) 3.8 104 N
C) 1.9 103 N
D) 3.8 103 N
E) 1.9 105 N